Be prepared for a long period of trial and error. Even when the obvious bugs are ironed out, and things are 90% working, it is the 10% that will get you.

Also I would advise to have all trades pass through a layer of sanity check logic before being sent to the exchange. Check the order size, and check the sequence of trades that you aren't buying at ask and selling at bid 10,000 times in a row.

Be prepared for a long period of trial and error. Even when the obvious bugs are ironed out, and things are 90% working, it is the 10% that will get you.

Also I would advise to have all trades pass through a layer of sanity check logic before being sent to the exchange. Check the order size, and check the sequence of trades that you aren't buying at ask and selling at bid 10,000 times in a row.

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Thanks for the good point!

We are thinking of more detailed processes/procedures, such as time-shifts for human monitoring, etc.

Okay, we had previously already something in existence...
so we went our own route.
Lets not dwell on which platform to use, etc.
Lets focus more on process/procedures/controls, etc.

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The platform is a huge part of the system. Not dwelling on it is sort of like worrying about what type of brakes & tires you are going to buy without taking the type of car into account.

Also, I doubt you are directly connected to an exchange unless you have access from a current employer. The feeds and lines alone for that are very expensive and most people don't turn that stuff on until they have a working system ready to trade.

A prop firm telling you they are "directly connected to the exchange" is most probably a lie.